Started cleaning up library stuff

frontend/src/components/Billing.jsx

@@ -2,7 +2,6 @@ import React, { useState, useEffect } from "react";
 import ReactGA from 'react-ga4';
 
 import theme from "../theme.jsx";
-import { useTheme } from "@mui/styles";
 import countries from "../components/Countries.jsx";
 import {
 	Box,

frontend/src/components/LicencePopup.jsx

@@ -2,7 +2,6 @@ import React, { useState, useEffect } from "react";
 import ReactGA from 'react-ga4';
 
 import theme from "../theme.jsx";
-import { useTheme } from "@mui/styles";
 import countries from "../components/Countries.jsx";
 import {
     Box,

frontend/src/components/NewHeader.jsx

@@ -28,7 +28,7 @@ import {
   Dialog,
   DialogTitle,
 } from "@mui/material";
-import { makeStyles } from '@mui/styles';
+import { makeStyles } from '@mui/system';
 
 import {
   Close as CloseIcon,